Submission #474201

#	Time	Username	Problem	Language	Result	Execution time	Memory
474201		hoanghq2004	Potatoes and fertilizers (LMIO19_bulves)	C++14	100 / 100	253 ms	15220 KiB

bulves

#include <bits/stdc++.h>

using namespace std;

const int Nmax = 5e5 + 10;

int n;
long long dif[Nmax], ans;
priority_queue <long long> opt;

int main() {
    ios :: sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        int a, b;
        cin >> a >> b;
        dif[i] = dif[i - 1] + a - b;
    }
    for (int i = 1; i < n; ++i) {
        if (dif[i] < 0) ans -= dif[i], dif[i] = 0;
        opt.push(dif[i]), opt.push(dif[i]);
        opt.pop();
        ans += dif[i];
    }
    while (opt.size()) ans -= min(dif[n], opt.top()), opt.pop();
    cout << ans;
}

• Subtask 1: 24 / 24
• Subtask 2: 10 / 10
• Subtask 3: 20 / 20
• Subtask 4: 10 / 10
• Subtask 5: 36 / 36